JPH0212030Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention relates to a tool holder used when attaching and detaching a machining tool to and from the main shaft of a machine tool, and is particularly capable of gripping a turning tool holder and a milling tool holder. This invention relates to a turning tool holder suitable for a tool changing arm.

[Technical background of the invention and its problems]

When using an automatic tool changer (ATC) to automatically exchange tools between the spindle of a machine tool and a tool storage magazine, the tool is usually mounted in a tool holder and the tool holder is This is done by gripping it with the tool exchange arm. The tool holder is usually provided with a spindle insertion part (taper shank part) that is inserted into the main spindle, a tool mount part where the tool is attached and fixed, and a tool holder between the taper shank part and the tool mount part, and is held by a tool exchange arm. It is made up of a grip section.

In recent years, as multifunctional machine tools equipped with rotary tables have become more multifunctional, both turning machining, in which the workpiece is rotated and the tool is not rotated, and milling, in which the workpiece is not rotated and the tool is rotated, have become more and more versatile. Multi-functional machine tools have been developed that allow this. In such machine tools, each turning tool and milling tool stored and held in a tool storage magazine using a tool holder are selected as appropriate and replaced and mounted on the main shaft of the machine tool to perform the respective machining. .

In general, turning tool holders are made with
The shape and dimensions are larger than those of the milling tool holder, and the shape and dimensions of the grip portion gripped by the tool exchange arm are also different from the milling tool holder.

Therefore, conventional automatic tool changers require dedicated tool change arms for each of the turning tool holder and the milling tool holder, which has the drawback of complicating the structure and increasing the size of the automatic tool changer. was.

In order to solve these drawbacks, there is a demand for the development of an automatic tool changer that can hold both the turning tool holder and the milling tool holder with the same tool change arm. A turning tool holder is desired that has a shape that can be held by a tool changing arm that can hold the turning tool holder.

[Purpose of invention]

The present invention was made with these points in mind, and the purpose is to provide a turning tool holder suitable for a tool changing arm that can grip both a turning tool holder and a milling tool holder. shall be.

[Summary of the idea]

The present invention includes a tool mounting part where a tool is mounted and fixed, a spindle insertion part which is inserted into the main spindle of a machine tool,
A tool changer that can grip both a turning tool holder and a milling tool holder, which is equipped with a grip part that is placed between the tool mounting part and the spindle insertion part, and has a non-rotation key fixed to the periphery. A turning tool holder suitable for use with
The grip portion includes a substantially fan-shaped flange portion having a pair of tapered guide side surfaces formed so as to approach each other in the direction of the detent key, and a flange portion adjacent to the flange portion and having a diameter smaller than that of the flange portion provided on the tool mounting portion side. It is characterized by consisting of a cylindrical part.

[Example of idea]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, reference numeral 10 is a turning tool holder (hereinafter referred to as "tool holder").
The tool holder 10 has a tapered shank portion that is inserted into the main shaft of a machine tool, and a collet 12 that is clamped by a clamp device in the main shaft is fixed to the tip end of the taper shank portion. Further, reference numeral 13 is a tool mounting part for mounting and fixing a turning tool, and a pair of holding plates 14 are arranged at a predetermined interval, and a tool inserted between the holding plates 14 is fixedly held. A bolt 15 is provided. A grip portion 20 is provided between the taper shank portion 11 and the tool attachment portion 13 and is gripped by a tool exchange arm. The grip part 20 is
It consists of a flange part 21 provided adjacent to the taper shank part 11, and a cylindrical part 22 smaller in diameter than the flange part 21, adjacent to this flange part 21 and provided on the tool attachment part 13 side. Detent keys 23 are fixed to the peripheral ends of the flange portion 21 and the cylindrical portion 22 when attached to the main shaft (in this embodiment, two keys 23 are fixed at symmetrical positions).
A pair of tapered guide side surfaces 24 are formed on the flange portion 21 so as to approach one of the detent keys 23 toward each other. The tapered guide side surface 24 is formed so that two side surfaces are substantially perpendicular to each other and are not located inside the outer periphery of the cylindrical portion 22 . Further, each of the tapered guide side surfaces 24 of the flange portion 21 is provided with an arcuate notch 25 . This notch 2
5 is provided on the side of the tapered guide side surface 24 adjacent to the tapered shank portion 11 .

The detent key 23 has a portion fixed to the flange portion 21 that has a larger diameter than a portion fixed to the cylindrical portion 22, and a recessed groove 26 for preventing slippage is provided in this stepped portion.
is formed.

Next, the manner of use of this embodiment having such a configuration will be explained.

FIG. 4 is a plan view showing an example of a tool exchange arm on which the tool holder according to the present embodiment is held. This tool exchange arm 30 has an arm main body 3.
A fixed gripper is constructed by forming an arc-shaped notch 32 at the end of the gripper and a flat part 33 on the upper periphery of the notch 32, and a direction in which the tips of the fixed gripper are spaced apart from each other on the flat part of the fixed gripper. It is provided with a pair of clamp claws 35 which are placed so as to be openable and closable and form an arcuate portion 34 that is substantially concentric with the arc-shaped notch 32 and has a smaller diameter than the diameter of the notch 32 .

A key groove 36 is formed at the innermost part of the notch 32 of the fixed gripper, and a locking member 37 for preventing the gripper from coming off is disposed within the key groove 36 so as to be movable up and down in the vertical direction in the drawing. A convex portion 37a is provided at the upper end of the locking member 37 to engage with the groove 26 of the detent key 23 fixed to the tool holder.

Each of the clamp claws 35 has a rear end connected to the pin 3.
8 to the arm body 31, and the rear end edge abuts a stopper 39 embedded within the arm body 31. This stopper 39 is pressed by a spring 41 and biases the clamp claw 35 in the closing direction. Furthermore, protrusions 42 are formed on the arc portions 34 of the clamp claws 35 adjacent to the key grooves 36, respectively.

A drive shaft 43 is fitted into the center of the arm body 31, allowing the arm body 31 to pivot and move forward and backward in the axial direction.

Tool exchange arm 30 having such a configuration
When gripping the tool holder 10 according to this embodiment using 10, and by moving the arm body 31 and the tool holder 10 toward each other relative to each other, the notch 32 of the stationary gripper is aligned with the cylindrical portion 2.
2 to abut and engage. During this relative approach movement, the tapered guide side surface 24 of the flange portion 21 of the tool holder 10 is pressed against the clamp claws 35, causing the clamp claws 35 to swing in a direction in which their tips move away from each other. The clamp claw 35 swings very smoothly because the pair of tapered guide side surfaces 24 form a wedge shape with an angle of about 90 degrees. When the clamp claw 35 swings and the protrusion 42 reaches the position where it engages with the notch 25 of the tapered guide side surface 24,
With the notch 25 pressed against the projection 42, further penetration of the tool holder 10 into the fixed gripper is stopped. Also, the detent key 2
3 enters the key groove 36, and the protrusion 3 of the locking member 37 enters the concave groove 26 of the detent key 23.
7a is once lowered and then raised again to engage and prevent the gripped tool holder 10 from coming off. Cylindrical portion 22 and fixed gripper notch 3
2 abuttingly engages, the flange portion 2
The flat surface 21a on the side of the cylindrical portion 22 of the tool holder 10 is placed on the flat surface portion 33 of the fixed gripper, and the tool holder 10 is gripped.

Tool holder 1 gripped by a fixed gripper
0, the locking member 37 is pushed down to disengage the concave groove 26 and the convex portion 37a, and the tool holder 10 is pulled out in a direction perpendicular to the axis of the tool holder 10.

The tool exchange arm 30 grips the milling tool holder (not shown) by opening and closing the clamp claw 35 and gripping the grip portion of the milling tool holder with the arcuate portion 34. In this case, the diameter of the grip part of the milling tool holder is made smaller than the diameter of the notch 32, so that the fixed gripper does not get in the way.

As described above, the tool holder according to this embodiment can perform a turning tool exchange operation favorably by being used with a tool exchange arm that can grip both the turning tool holder and the milling tool holder.

[Effect of idea]

As explained above, according to the present invention, it is possible to obtain a turning tool holder suitable for a tool exchange arm capable of gripping both a turning tool holder and a milling tool holder.

[Brief explanation of the drawing]

FIG. 1 is a side view of the tool holder according to the present invention, FIG. 2 is a view seen from the direction of the arrow in FIG. 1, and FIG. 3 is a front view including a partial cross section of the tool holder according to the present invention.
FIG. 4 is a partial plan view showing an example of the tool changing arm that grips the tool holder according to the present invention, and FIG. 5 is a partial plan view showing the operating state of the tool changing arm shown in FIG. 4. 11...Taper shank part, 13...Tool mounting part, 20...Grip part, 21...Flange part,
22... Cylindrical part, 23... Rotation key, 24...
... Taper guide side surface, 25 ... Notch, 26 ... Concave groove.

Claims (1)

[Scope of utility model registration request] a tool mounting part to which a turning tool is mounted and fixed; a spindle insertion part to be inserted into the main spindle of a machine tool;
disposed between the tool mounting part and the spindle insertion part,
A turning tool holder comprising a grip portion having a rotation locking key fixed to the peripheral end thereof,
The grip portion includes a substantially fan-shaped flange portion having a pair of tapered guide side surfaces formed to approach each other in the direction of the detent key, and a flange portion adjacent to the flange portion and provided on the tool mounting portion side. A turning tool holder characterized by comprising a cylindrical part having a smaller diameter than the cylindrical part.